Multicolor photon emission from organic thin films on different substrates

• Novel organic thin films on specific substrates show multicolor photon emission.
• Using porous silicon as a substrate allows to observe blue, green and red emission simultaneously.
• Contribution of color components can be tuned by adjusting the excitation wavelength.

Thin films of 1-pentyl-2/,3/-difluoro-3///-methyl-4////-octyl-p-quinquephenyl and 9,10-Bis (4-pentylphenylethynyl)antracene organic molecules were grown on optical glass, silicon and porous silicon substrates. First optical and luminescent properties of such hybrid composites are thoroughly studied using spectroscopic techniques. The strong decrease of aggregation in thin films of 1-pentyl-2/,3/-difluoro-3///-methyl-4////-octyl-p-quinquephenyl on porous silicon was observed. The possibility of simultaneous red, green and blue tunable photon emission from organic film/porous silicon hybrid structure is demonstrated.